Ionizing radiation and a variety of radioactive
materials are an integral part of the research activities at Jefferson Lab. Ionizing
radiation is generated by interactions of the accelerated electron beam with
beam line components (e.g.: magnets, flanges, and beam dumps) and
experimental equipment such as targets and detectors. These interactions give
rise to two sources of potential ionizing radiation exposure:

·Prompt Radiation: emitted in the above interactions only when an accelerator is
running and stops when the accelerator is turned off.

·Induced Radioactivity:Prompt radiation can generate radioactive nuclei
in surrounding materials through activation (induced radioactivity). Activated materials continue to emit
radiation after the accelerator has been shut off. The potential for activation
exists to some extent in most areas of the Continuous Electron Beam Accelerator
Facility (CEBAF) accelerator and the Free Electron Laser (FEL).

Ionizing radiation emitted from any source presents
a hazard
issue, and is managed through the Jefferson Lab Radiation Control Department. Potential
impact is significantly reduced by adhering to the philosophy of keeping radiation
exposure ALARA
- “as low as reasonably achievable.” The ALARA
concept is an integral part of all activities that involve the use of radiation
or radioactive materials. This includes the design, construction, and operation
of existing and future facilities here at Jefferson Lab.
This chapter outlines requirements and procedures applicable to everyone at the
laboratory to ensure successful implementation of the program.

The
goals of the radiation protection program are summarized as follows.

·There should not be any exposure of workers to ionizing radiation
without the expectation of an overall benefit from the activity causing the
exposure.

·Radiological
activities should be optimized so that dose to personnel is kept as small as
practically possible.

·Place potentially radioactive tools,
equipment, and solid waste items in designated storage or waste containers.Keep unnecessary
items out of radiologically controlled areas, where they could become
activated.Report activated items or materials to the Radiation Control
Department if they have become unusable, and need to be disposed of.

·If you suspect, or know, that you are
pregnant and you desire any accommodation you must notify your supervisor. You
are also encouraged to discuss radiation monitoring with the Radiation
Control Manager.

Jefferson Lab expects all employees,
subcontractors, users, and visitors to fulfill their responsibilities as
outlined above, and to contact the Radiation Control Department (ext.
7551, 7212 or 876-1743) when clarification or assistance is needed.

Only appropriately trained Radiological
Control Technologists (RCT) are authorized to release material from
radiological controlled areas (RCA); ARMs are not authorized to perform these
duties. Contact the Radiation Control Department (ext. 7551, 7212 or 876-1743)for more
information.

This document is
controlled as an on line file.It may be
printed but the print copy is not a controlled document.It is the user’s responsibility to ensure
that the document is the same revision as the current on line file.This copy was printed on 8/5/2016.